Valve grinding machine or device



Aug. 30, 1949.

S. J. PETERSEN I VALVE GRINDING MACHINE OR DEVICE 2 Sheets-Sheet 1 Filed NOV. 18, 1946 I JO . dig

1949- s. .1. PETERSEN 2,480,259

VALVE GRINDING MACHINE OR DEVICE Filed Nov. 18, 1946 2 Sheets-Sheet 2 of the support.

The gland 39 is preferably provided with a recess 4| for the reception of packing material,"

2,480,259 f. 1 Y j and the end of the sleeve 42 thrusts against the J bearing 31 for maintaining it in position. The sleeve 42 is preferably of the split type, as at 43, and is provided with a circumferential collar 44, by means of which the sleeve may be held against rotation while a nut or collar 45 is being threaded upon the sleeve to clamp thelatter to the shaft 34. The gland 39 preferably has 7 threaded engagement with the extension 36.

The rotatable support embodying the sections I1 and i8 is rotatably held in position with respect to the collar I5 and the motor casing H1, in any suitable manner, andto that end the support telescopes into the collar l5 so as to abut the flange l6, and a retaining collar 46 is threaded into the collar 15, and engages under a peripheral flange 41 on the section l8, within the collar l5. This collar 46 may be held against accidental displacement by means of a spring 46*, engaging a flange on the collar, and the adjacent edge of the collar l5. The upper edge of the section I! is provided with ratchet teeth 48, which may be formed in the upper face of the wall of the section.

IT, or in an annular member 49, which latter may be secured to the section II.

Carried by the motor casing I 0, is a suitable support 50 (Figs. 2 and 6), in which is mounted a dog or pawl 5| which slides in a bearing 52. This dog or pawl is controlled by a spring 53, and the pawl co-operates with the teeth 48, the teeth 48 and the nose 54 of the pawl being so disposed with respect to each other, that the support embodying the sections I1 and I8 is adapted to be rotated in one direction only with respect to the motor and the motor casing.

When the motor is operating, the shaft II will be rotated to rotate the gear 29, and this gear will rotate the gears 28, 21, 26, and 24, thereby; imparting a rotary movement to the crank 30,

which is on the shaft 2|. As the crank rotates, the shaft 34 will be given an oscillatory movement through the medium of the pin and slot connection 3|, 32 of the crank 30 with the shaft 34.

slight, or is not sufficient to create a substantial resistance to the oscillation of the shaft 34, the rotatable support l1--l8 will not be rotated.

However, if the pressure exerted by the tool upon the work, or the resistance of the work to the action of the tool, is suflicient, the motion of the shaft 34 will be resisted, and this resistance, if sufiicient, will, through the medium of the cranks 33 and 30, and the gear connection with the motor, shaft H, cause the torque of the motor to rotate" the support l'll8. This will result in not only an oscillatory movement of the shaft 34, but also a bodily rotation or shifting of the shaft with the rotatable support.

In order to insure that the rotation of the support ll--l8 will be in a constant direction, the pawl and ratchet mechanism is provided. As soon as the pressure of. the tool upon the work, or the resistance to the oscillatory action of-thev 'when 'the tool 55 is removed.

shaft 34, is relieved, the support l1 l8 will not be rotated, but an oscillatory movement will be given to the shaft with respect to the support. The degree of bodily rotary movement of the shaft 34, with the support I1-l8, will be controlled entirely by the pressure of the tool against the work.

One form of tool is shown in Figs. 1 and 3, and embodies" a substantially cupeshaped flexible member 55, having a sleeved portion 56. In order to attach this tool to the shaft, there may be provided a split sleeve 51, having a threaded portion 58. This sleeve is telescoped upon the end of the shaft, and is secured to the shaft by means of a nutter collar 59, engaging the treaded portion 58 of the split sleeve. By adjustment of the collar 59 on the threaded portion 58, the

split portion of the sleeve will be caused to bind upon the shaft to secure the sleeve 51 adjustably thereto. The tool is ,attached to the shaft by sleeving the tubular portion 56 of the tool over the sleeve 51. This sleeve may be slotted, "as at 60, for'the reception of a difierent kind of tool,

With this improved construction, the shaft 34, and the motor shaft, are in alinement, and are spaced fromeach other, the connecting or operating gears being disposed therebetween in a manner that they transfer the power from center line to off-center, and then back again to center line. The result is that the working or tool carrying shaft will be in direct alinement with the .55 If the pressure of the tool upon the work is" 4 been herein shown and described, it is to be understood that various-changes may be made in the details of construction, and in the manner of effecting such rotary motion of the support, as well as in the combination and arrangement of all of the various-parts, within the'scope of the claims, without departing from the spirit of this invention. I a

What is claimedas new is:

1. A valve grinding device comprising a motor, a housing supported by said motor and mounted for rotation with respect thereto, a tool-carrying shaft supported by said housing and mounted for rotation with respect to said housing, means within said housing and connecting said shaft with said motor for imparting an oscillatory movement to said shaft, ratchet teeth around one end of said'housing, a pawl supported by said motor and engaging said teeth to thereby rotate a housing mounted on said motor for rotation with respect thereto, a tool-carrying shaft mounted in said housing for rotation with respect to the housing, a plurality of parallel shafts within said housing, means connecting said motor with said pluraiityof shafts to rotate said shafts, a crank on one .of said last named shafts, a pin on said crank, a slotted arm on one end of said tool-carrying shaft, the slot in said arm receiving said pin whereby to impart an oscillatory motion to said tool-carrying shaft, ratchet teeth on one end of said housing, and a pawl on said motor engaging said ratchet teeth, whereby said housing will be rotated intermittently in one direction upon the application of sufiicient pressure on said tool-carrying shaft.

3. A valve grinding device comprising a motor, a housing mounted on said motor for rotation with respect to the motor, a tool-carrying shaft mounted for rotation in said housing and extend-- ing therebelow, crank means within said housing and connecting said shaft with said motor to impart an oscillatory motion to said shaft, and pawl and ratchet means at one end of said housing operable in response to the application of pressure to said shaft to rotate said housing intermittently in one direction.

4. A valve grinding device as defined in claim 3, said last named means including ratchet teeth .on said housing and a spring actuated pawl on said motor.

5. A valve grinding device comprising a motor, a housing mounted on said motor for rotation with respect thereto, a tool-carrying shaft mounted for rotation in said housing and extending therebelow, crank means within said housing and connecting said shaft with said motor to impart an oscillatory movement to said shaft, and pawl and ratchet means between said motor REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date Re. 13,421 Hazeltine May 21, 1912 930,472 Harding Aug. 10, 1909 1,099,392 Norling June 9, 1914 1,122,998 Peterson Dec 29, 1914 1,246,120 Leggett Nov. 13, 1917 1,284,127 Miller Nov. 5, 1918 1,307,146 Patterson et a1 June 17, 1919 1,377,558 Burke May 10, 1921 1,402,144 Burke et a1.' Jan. 3, 1922 

